[mythtv-users] PVR-500 Dual Tuner

Hamish Moffatt hamish at cloud.net.au
Sun Dec 5 06:23:16 UTC 2004

On Thu, Dec 02, 2004 at 06:07:40PM -0800, Bruce Markey wrote:
> Myth had two different concepts for padding that are not intertwined
> but are often confused. First, on the options page for any record
> rule, minutes can be added or subtracted from the beginning and the
> end. This information is used bu the scheduler in planning the schedule
> and is always honored. If this creates more conflicts than tuners,
> a show will not record if it cannot fit. 
> There is also a global pre-roll and post-roll seconds. This is used
> by the encoders at record time. The encoders can get a head start
> ahead of the scheduled time of every show it is asked to record and
> this is none of the the scheduler's business. If two shows are back
> to back, the encoder goes from one to the next and quietly forgoes
> the extra time.
> >Can you tell I have been frustrated to miss the end of a program?
> More cards.

I've got two cards in my system. I still lose the end of programs a bit
too often though. Here's what I've found.

I've got the global pre-roll set to 90 seconds (could afford to be 0,
really), and the global post-roll set to 20 minutes because almost every
evening program here runs late (especially the ones after Australian
Idol etc!).

If I have two programs scheduled back to back but on different channels,
Myth will record both of these on one card, forgoing the post-roll. As a
result, I often lose the end of the first program, even though the
second card is idle.

Now, I can extend the ending time which will force Myth to record the
other program on the second tuner. But then this can cause problems
with back to back shows on the same channel. Sometimes I need to
extend the recording time for one episode of a program only,
which I don't think it possible? (Not in Mythweb anyway?)

So it seems that it would be useful for the scheduler to be aware
of the global pre/post-roll so as to better utilise multiple tuners.
But still make it expendable if conflicts arise.

Hamish Moffatt VK3SB <hamish at debian.org> <hamish at cloud.net.au>

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